Inner rail release device for a slide

Abstract

An inner rail release device for a slide includes a holder, a pulling rod, a first shifting block, a second shifting block, a first elastic member, a second elastic member and a driving member. The holder, the pulling rod, the first shifting block, the second shifting block, the first elastic member and the second elastic member are installed on a surface of an inner rail, and the driving member is installed on a middle rail, and the driving member is disposed opposite to the first shifting block and the second shifting block. The invention improves the convenience of operation significantly.

What is claimed is: 
     
       1. An inner rail release device for a slide composed of an outer rail, a middle rail disposed inside an outer slide of a sliding assembly, and an inner rail disposed inside the middle rail of the sliding assembly, and the inner rail release device being installed on both of the middle rail and the inner rail, comprising:
 a holder, installed on a surface of the inner rail, and a sliding space being defined between the holder and the inner rail; 
 a pulling rod, movably installed in the sliding space, disposed closely to the surface of the inner rail, and both ends of the pulling rod having an operating portion and an actuating portion respectively, and a first inclined surface and a second inclined surface being extended and formed when the actuating portion is moved with respect to the slide, and the first inclined surface and the second inclined surface being disposed obliquely and downwardly towards the outward direction with respect to the slide; 
 a first shifting block, pivotally installed to the surface of the inner rail and configured to be corresponsive to a side of the actuating portion, and having a first oblique block protruded from a surface of the first shifting block, and the first oblique block leaning against the first inclined surface; 
 a second shifting block, pivotally installed to the surface of the inner rail and configured to be corresponsive to an another side of the actuating portion, and both of the first shifting block and the second shifting block being tilted to an angle and disposed symmetrically and respectively on both sides of the actuating portion, and a second oblique block being protruded from a surface of the second shifting block, and the second oblique block leaning against the second inclined surface, and an engaging space being formed between the first shifting block and the second shifting block; 
 a first elastic member, installed in the holder and coupled to the pulling rod, such that the pulling rod normally moves in an inward direction with respect to the slide; 
 a second elastic member, suspendably disposed with an interval from a side of the inner rail, and both sides of the second elastic member abutting against the first shifting block and the second shifting block, and the first shifting block and the second shifting block being rotated downwardly to abut against a bottom edge of the inner rail; and 
 a driving member, installed on a side of the middle rail opposite to the inner rail, and the driving member being corresponding to the engaging space, and the inner rail and the middle rail being slidably coupled with each other; such that when the pulling rod is operated, the first shifting block and the second shifting block are rotated upward synchronously, so that the engaging space becomes an open space, and the inner rail and the middle rail are separated from each other, and when the pulling rod restores its original position and the inner rail is moved with respect to the middle rail, the driving member upwardly pushes the first shifting block away to return to the engaging space, so that the inner rail and the middle rail are slidably coupled with each other again. 
 
     
     
       2. The inner rail release device for a slide according to  claim 1 , wherein the pulling rod has a first limiting portion corresponding to a fixing position of the first elastic member, so that the pulling rod is limited and moved reciprocally with respect to the fixing position. 
     
     
       3. The inner rail release device for a slide according to  claim 2 , wherein the pulling rod has a second limiting portion corresponding to a pivoting position of the first shifting block, so that the pulling rod is limited and moved reciprocally with respect to the pivoting position. 
     
     
       4. The inner rail release device for a slide according to  claim 3 , wherein the inner rail surface has at least one positioning portion corresponding to an underside of the pulling rod, and the pulling rod is movably clamped in the positioning portion. 
     
     
       5. The inner rail release device for a slide according to  claim 1 , wherein the first elastic member is a linear spring, and both ends of the first elastic member abut against the pulling rod and the holder respectively to define a latching relation. 
     
     
       6. The inner rail release device for a slide according to  claim 1 , further comprising an auxiliary block installed at an another end of the pulling rod opposite to the actuating portion. 
     
     
       7. The inner rail release device for a slide according to  claim 6 , wherein the actuating portion has a plurality of insert holes configured to be corresponsive to the auxiliary block, and the auxiliary block has two hooks corresponsive to the insert holes for latching and fixing the auxiliary block to the actuating portion. 
     
     
       8. The inner rail release device for a slide according to  claim 1 , wherein the second elastic member is made of an elastic material, and a first fixed portion and a second fixed portion are formed at an end of the second elastic member, and a first elastic arm and a second elastic arm are extended and formed at an another end of the second elastic member and configured to be corresponsive to the first shifting block and the second shifting block respectively. 
     
     
       9. The inner rail release device for a slide according to  claim 8 , wherein the first elastic arm has an end abutting against the first shifting block, and the second elastic arm has an end abutting against the second shifting block. 
     
     
       10. The inner rail release device for a slide according to  claim 1 , wherein the driving member is a structure having a substantially L-shaped cross-section and made by bending a metal plate, and a side of the driving member is embedded into a surface of the middle rail, and a length of the driving member protruding outside is corresponsive to a distance from the middle rail to the inner rail.